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Peristaltic pump

a pump and occlusion bed technology, applied in the direction of machines/engines, flexible member pumps, positive displacement liquid engines, etc., can solve the problems of limiting the ability to provide consistent spacing, complicated linkage used to open and close the occlusion bed with respect to the pump body, and additional complications

Active Publication Date: 2009-01-20
MASTERFLEX LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The patent describes a peristaltic pump that can move between an open and closed position. It has a support structure and a pump body with a curved surface. The support structure is fixed to the pump body when closed. The pump has a mechanism to keep a tube in place, and the support structure can move independently of a movable retainer. The pump also has a linkage mechanism that locks the support structure to the pump body when closed. The technical effects of this invention are a more stable and reliable peristaltic pump that can easily move between open and closed positions."

Problems solved by technology

The spacing between the occlusion bed and the rotor assembly is critical for proper pump operation, and known prior art pumps have a number of disadvantages that limit the ability to provide consistent spacing.
For example, the linkage used to open and close the occlusion bed with respect to the pump body is very complicated, requiring numerous components to create the linkage.
Moreover, the tolerances of each of the components results in additional complications.
However, the spacing between an occlusion bed and a rotor assembly is unforgiving from a tolerance standpoint since it is used both to provide a compressive force between the rotor assembly and occlusion bed pump and to locate the occlusion bed with respect to the rotor assembly.
Further, installation of the tube is complicated in known pumps.
Known peristaltic pumps lack the ability to provide a constant stretching independent of tube size.

Method used

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Examples

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Embodiment Construction

[0042]An exemplary embodiment of a peristaltic pump 100 is shown in an open position in FIG. 1. It includes a pump body 102. A support structure 104 is movably secured to a front surface of pump body 102, both components having generally planar portions that are brought into a facing relationship with each other. The planar portions are perpendicular to an axis of rotation A-A, defined below, and include, for purpose of description, both a vertical axis and a horizontal axis of pump 100. In turn, a tube retaining mechanism 106 is associated with a front surface of support structure 104. A front cover 108 with an opening 110 receives a portion of retaining mechanism 106 in a manner such that the retaining mechanism is disposed between support structure 104 and the front cover 108. Moreover, front cover 108 and pump body 102 secure a rotor assembly 112, the rotor assembly rotating about a fixed axis A-A defined by a central shaft 113 (FIG. 3) of the rotor assembly. Shaft 113 extends t...

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PUM

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Abstract

A peristaltic pump for pumping fluids through a flexible tube has a pump body, a support structure, a tube retaining mechanism and a linkage mechanism. Locating features make sure that the support structure is at a fixed location with respect to the pump body when the pump is in the closed position. The support structure controls movement of the retaining mechanism. The linkage mechanism applies the necessary force to move the support structure so that the pump is moved from an open position to a closed position.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to provisional application U.S. Ser. No. 60 / 549,532, filed on Mar. 4, 2004 and is included herein in its entirety.[0002]The present invention relates to a peristaltic pump. More particularly, it relates to a peristaltic pump that automatically positions the various components to facilitate tube placement, promote optimal pump operation and extend tube life.BACKGROUND OF THE INVENTION[0003]Rotary peristaltic pumps are usually used for moving liquids through flexible tubing. A typical pump has a rotor assembly with a shaft, two plates, and several rollers. The plates are fixed to the shaft, perpendicular to the axis of the shaft. The rollers are secured, by means of respective axles, between the two plates. The rollers, being nearly identical in diameter, are situated at essentially the same radial distance from and equally spaced angularly about the rotor shaft axis. In turn, the shaft is connected to a moto...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F04B43/08F04B43/12
CPCF04B43/1253
Inventor LIMOGES, ROBERT F.
Owner MASTERFLEX LLC